Sin^2φ線図の非線形性解析によるショットピーニング鉄鋼材の非破壊残留応力分布評価

概要

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A new method of nondestructive estimation of the in-depth distribution of residual stresses is proposed by using monochromatic high-energy X-rays from synchrotron radiation source SPring-8. The X-ray with 72 keV energy was used for stress measurements of shot-peened steel samples, whose compressive zone extended a few hundred micrometers below the surface. The measurements were carried out by using the sin^2 φ method in a Ψ-diffractometer. The obtained results of sin^2 φ diagrams showed nonlinearity due to the in-depth distribution of the residual stress. The stress distribution below the surface was estimated from the analysis to the nonlinearity of sin^2φ dragrams. The estimated stress distribution agreed well with that determined by the conventional sin^2 φ method with Cr-Kα radiation corrected by surface removal effect.
社団法人日本機械学会の論文
2003-06-25